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The All-in-One Guide to C++20

Solution: Implement Arithmetic Concept

Explore how to implement the Arithmetic concept in C++20 to ensure template arguments meet specific type requirements. Learn how this concept improves type safety by restricting templates to matching types that support arithmetic operations, helping you write robust and maintainable code.

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Solution

C++
#include <type_traits>
#include <iostream>
#include <string>
template<typename T>                                 
concept Arithmetic = std::is_arithmetic<T>::value;       
template <Arithmetic T>
T sum(T a, T b) {    
    return a + b;
}
int main() {  
    std::cout << std::endl;
    
    std::cout << "sum(2000, 11): " << sum(2000, 11) << std::endl;
    // std::cout << "sum(2000, 10.5): " << sum(2000, 10.5 ) << std::endl;
    
    std::string hello("Hello");
    std::string world(" World");
    // std::cout << "sum(hello, world): " << sum(hello, world) << std::endl;
    
    std::cout << std::endl;  
}

The function template sum requires from its ...